Low Stakes Test Flashcards
What does covalent bonding occur between
Non metals
What does ionic bonding occur between
Metals and non metals
What happens to electrons in covalent bonding
They are shared
what happens to the electrons in ionic bonding
They are transferred from metal to non metal
What happens to the electrons in metallic bonding
They are shared
What are the two types of covalent structures
Giant covalent structures
Simple covalent structures
Why do ionic substances have a high melting point
It takes a large amount of energy to break the strong ionic bonds
When do ionic substances conduct electricity
When they are molten or aqueous ( dissolved in water )
Why do giant covalent substances have a high melting point
It takes a lot of energy to break a huge network of atoms
Why do simple covalent substances have low melting points
It only takes a small amount of energy to break the weak intermolecular forces
What are the difference in structures between diamond and graphite
-Delocalised electrons between the layers (graphite)
-4 bonds to every atom (diamond)
-3 bonds to every atom (graphite)
Why do metals have high melting points
Takes large amount of energy to break the electrostatic forces
What is an alloy
A mixture of metals
What is a fullerene
A network of carbon atoms arranged in hollow shape
